add -n option for FSshell cat
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Key: HADOOP-7795
URL: https://issues.apache.org/jira/browse/HADOOP-7795
Project: Hadoop Common
Issue Type: Improvement
Components: fs
Affects Versions: 0.24.0
Reporter: XieXianshan
Assignee: XieXianshan
Fix For: 0.24.0
Add -n option for cat to display the files with line numbers.It's quite useful
if you're reading big files.
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